Device, system and method for color display

Abstract

A color Liquid Crystal Display (LCD) device for displaying a color image using at least four different primary colors, the device including an array of Liquid Crystal (LC) elements (214), driving circuitry (218) adapted to receive an input corresponding to the color image and to selectively activate the LC elements (214) of the LC array to produce an attenuation pattern corresponding to a gray-level representation of the color image, and an array of color sub-pixel filter elements (216) juxtaposed and in registry with the array of LC elements (214) such that each color sub-pixel filter element is in registry with one of the LC elements, wherein the array of color sub-pixel filter elements comprises at least four types of color sub-pixel filter elements, which transmit light of the at least four primary colors, respectively.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a National Phase Application of PCT International Application No. PCT / IL02 / 00452, International Filing Date Jun. 11, 2002, claiming priority of U.S. Provisional Patent Application, 60 / 296,767, filed Jun. 11, 2001, U.S. Provisional Patent Application, 60 / 318,626, filed Sep. 13, 2001, and U.S. Provisional Patent Application, 60 / 371,419, filed Apr. 11, 2002.FIELD OF THE INVENTION[0002]The invention relates generally to color display devices, systems and methods and, more particularly, to display devices, systems and methods having improved color image reproduction capability.BACKGROUND OF THE INVENTION[0003]Standard computer monitors and TV displays are typically based on reproduction of three, additive, primary colors (“primaries”), for example, red, green and blue, collectively referred to as RGB. Unfortunately, these monitors cannot display many colors perceived by humans, since they are limited in the range of color t...

AI Technical Summary

Benefits of technology

[0010]An aspect of the invention provides improved multi-primary display devices using more than three sub-pixels of different colors to create each pixel. In embodiments of this aspect of the invention, the use of four to six (or more) different color sub-pixels, per pixel, allows for a wider color gamut and higher luminous efficiency. In some embodiments, the number of sub-pixels per pixel and the color spectra of the different sub-pixels may be optimized to obtain a desired combination of a sufficiently wide color gamut, sufficiently high brightness, and sufficiently high contrast.

[0011]In some embodiments of the invention, the use of more than three primary colors may expand the reproducible color gamut of the display by enabling the use of relatively narrow wavelength ranges for some of the primary colors, e.g., red, ...

Problems solved by technology

Unfortunately, these monitors cannot display many colors perceived by humans, since they are limited in the range of color they are capable of displaying. FIG. 1A schematically illustrates a chromaticity diagram as is known in the art.

However, chromaticity alone does not filly represent all visible color variations.

However, LCD technology is also used in non-portable...

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